<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
    <script type="text/javascript" src="js/jquery-1.12.4.js"></script>
    <script type="text/javascript" src="js/bootstrap.min.js"></script>
    <script type="text/javascript"></script>
    <style type="text/css">
        .container {
            height: 50px;
            background-color: gold;
        }

        /* 用负边距 平衡左右的15的间距 */
        .row {
            height: 50px;
            background-color: green;
        }

        .col-lg-5 {
            background-color: pink;
            height: 50px;

        }
    </style>
</head>

<body>
    <div class="container">
        <div class="row">
            <div class="col-lg-5">col-lg-5</div>


        </div>
    </div>

</body>

</html>